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Microsoft OneNote

ReadCube helps you collect and curate the research material that you're passionate about. The award-winning reference manager will dramatically improve the way you discover, organize, read, annotate, share, and cite.

A free note-taking service developed by Google. With Google Keep you can quickly capture what's on your mind and get reminded at the right time or place. Google Keep is available on the web, and has mobile apps for the Android and iOS mobile operating systems. You can use your original Google Account, email or phone to access your notes stored in Google's cloud.

Orginize your notes effortlessly in the cloud with Evernote. The application is designed or note taking, organizing, task management, and archiving. With Evernote users can find information and take notes in the form of text, drawings, photographs, or saved web content that can be shared with anyone. Evernote is available cross platform and is free to sign up for, however premium features are provided at a monthly cost.

Bear is a beautiful, flexible writing application for crafting notes and prose. The app is available for iPhone, iPad, and Mac and is quick and easy to reach for when inspiration strikes. Writers, lawyers, chefs, teachers, engineers, students, parents, and more use Bear to take notes and write. Bear provides an advanced markup editor with support syntax highlighting for over 150 programming languages and support for Markdown. The editor also allow for rich previews during the time of writing so that you can see the actual prose, not code. Each note can be individually encrypted and the application itself can be locked and opened with Face or Touch ID allowing you to protect sensitive information. Bear is available for free, while also providing premium feature via a subscription-based Pro version.